1) δ13C value of plant leave
植物叶片δ13C值
1.
The soil moisture and δ13C value of plant leave from 16 plant species under different backgrounds(karst and non-karst) are determined by analyzing the correlation between them.
通过测定贵州省清镇市王家寨小流域内不同背景区(喀斯特与非喀斯特)土壤的含水量以及16种植物叶片的δ13C值,比较了不同背景区从退化生态到非退化生态过程中各样地之间,以及石漠化和土山样地不同坡位之间土壤含水量与植物叶片δ13C值的相关关系。
2) δ13C value of leaves
叶片δ13C
1.
The difference of δ13C value of leaves between the two variances was not obvious.
采用LSD法对夏玉米两品种(郑单958和鲁单981)及各水分处理间植株叶片δ13C进行方差分析,并将其与叶重、水分利用效率及产量间关系进行了定性分析,以期为改进旱地和节水农业栽培及选育抗性品种提供参考价值。
3) stable carbon isotopic composition
沉水植物δ13C
4) plant leaf
植物叶片
1.
A new method of detecting the sulfur content in plant leaf, YX-DL type compact sulfur detector with fast, exact operating, character and low operation cost is described.
介绍了用YX-DL一体化定硫仪测定植物叶片含硫量的方法,该法具有速度快、成本低、操作简便、数据准确的特点。
2.
The modern agriculture and forest need high precision measurement of plant leaf, in order to confirm the best measure force, it needs exactitude measurement of elastic mould quantity of the plant.
现代农业要求对植物叶片进行高精度测量,为了确定最佳的测量力就要对植物的弹性模量进行精确测量。
3.
【Objective】This paper gave a recognition approach,which combined the shape feature and the texture feature of the plant leaf,to effectively solve the problem that the classification features of traditional plant recognition were usually not synthetic and the recognition rate was always slightly low,hoping to provide technical reference for rapid machine recognition for plant.
【目的】提出一种将植物叶片的形状特征与其纹理特征相结合的综合特征识别方法,有效解决了传统的植物机器识别分类特征单一且识别率较低的问题,为植物的快速机器识别提供技术参考。
5) Plant leaves
植物叶片
1.
Airborne dust detainment by different plant leaves: Taking Beijing as an example.;
植物叶片滞尘规律研究——以北京市为例
2.
A method for analyzing volatile constituents from plant leaves with gas chromatography/mass spectrometry(GC/MS) coupled with solid-phase microextraction(SPME) was developed.
采用固相微萃取(SPME)方法吸附植物叶片中的挥发性物质,然后采用气相色谱/质谱法(GC/M S)分析了挥发性物质的成分。
3.
Perchloric acid is used in extracting the fluoride content in plant leaves, which is socked in the TISAB combined with citric acid and sodium chloride.
本文采用高氯酸对植物叶片中氟化物含量浸取,以柠檬酸钠-氯化钠-冰醋酸所组成的总离子强度调节剂(TISAB),PH控制在5。
6) δ13C value
δ13C值
1.
In this study,by measuring stable carbon isotopes in leaves of 51 alpine plant species belonged to 19 families and 41 genera growing in the east of Tibetan Plateau in 2002 and 2003,we studied the variations of δ13C values between two year.
文章通过分析2002年和2003年青藏高原东部青海省门源县境内隶属于19科41属51种植物叶片的δ13C值,研究高寒草甸植物稳定碳同位素组成的年间变化及其与环境因子的关系,分析影响δ13C值变化的关键因子。
2.
Four long-term agricultural field experiments combined with an laboratory incubation experiment were conducted to evaluate the effect of organic,inorganic and organic+inorganic fertilizer application on δ13C value of soil organic matter(SOM)and humic acid(HA)in black soil,brown soil,meadow soil and paddy soil.
以黑土、棕壤、草甸土和水稻土为供试土壤,通过田间定位并结合室内培养试验,初步研究了不同施肥(包括施用化肥、有机肥以及有机肥配施化肥)条件下全土有机质和胡敏酸的δ13C值。
3.
The foliar δ13C values were used to denote the long-term water use efficiency(WUE)of plants whereas long-term nitrogen use efficiency(NUE)was estimated by the ratio of C to N.
对长汀水土流失区不同生态恢复程度生境马尾松(Pinus massoniana)与木荷(Schima superba)的叶片稳定碳同位素组成(δ13C)、比叶面积(specific leaf area,SLA)、叶N含量及C/N进行了分析,并以叶片δ13C值和C/N分别指示植物的水分利用效率(water use efficiency,WUE)和氮素利用效率(nitrogen use efficiency,NUE)。
补充资料：δ值
分子式：
CAS号：
性质：是稳定同位素质谱分析所给出的样品的重/轻同位素比值R样与标准样品的该比值及标的相对偏差，一般用千分数表示，定义为δ(％0)=[(R样-R标)/R标]×103。此值为正，则表示此样品比标准品富集重同位素；为负，则表示此样品比标准品贫重同位素。早期文献也有的将δ值以百分数表示的，应加以区别；δ值与标准品的选择有关，结果对比时应采用相同的标准。
CAS号：
性质：是稳定同位素质谱分析所给出的样品的重/轻同位素比值R样与标准样品的该比值及标的相对偏差，一般用千分数表示，定义为δ(％0)=[(R样-R标)/R标]×103。此值为正，则表示此样品比标准品富集重同位素；为负，则表示此样品比标准品贫重同位素。早期文献也有的将δ值以百分数表示的，应加以区别；δ值与标准品的选择有关，结果对比时应采用相同的标准。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条